/*
 * Copyright 2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.data.hadoop.store.strategy.rollover;

/**
 * A strategy interface used for file or stream writers to determine when a file or a stream
 * should be rolled over. Usual use case is to roll if file size becomes too large or if
 * written entries should be partitioned with a certain time slots.
 *
 * @author Janne Valkealahti
 *
 */
public interface RolloverStrategy extends RolloverStrategyFactory<RolloverStrategy> {

	/**
	 * Checks if strategy wants to rollover.
	 *
	 * @return true, if rollover should happen
	 */
	boolean hasRolled();

	/**
	 * Reset the strategy state.
	 */
	void reset();

	/**
	 * Sets the write position.
	 *
	 * @param position the new write position
	 */
	void setWritePosition(long position);

}
